Mold for casting-machines.



J. A. MORE 6; E. H. N. GERWIG. MOLD FOB CASTING MACHINES. AEPLIQATIONFILED APR. 30. 1909.

932,047. v Patented Aug. 24. 1909.

WITNESSES mvENfoRs 1% WW 4 E i .1;

m MMQZZ of a hot stove. On this account a large l in order to keep theapparatus in operative 110 UNITED STATES ISJATENT OFFICE.

JACOB A. HOHB, OF BBADDOGK, AND FBEDIlEBICK H. N. GERWIG, 0FWILKINSBURG,

PENNSYLVANIA.

MOLD FOR CASTING-MACHINES.

To all whom it may concern: I Be it known that we, JACOB A. Morin, ofBraddock, and FREDERICK H. N. GERWIG, of Wilkinsburg, Allegheny county,and State of Pennsylvania, have invented a new and useful Mold for(lasting-Machines, of which the following is a full, clear, and exactdescription, reference being had to the accompany ing drawings, formingpart of this specification, in whic Figure 1 is a longitudinal sectionalelevation showing a mold constructed and arranged in accordance with ourinvention; Fig. 2 is a longitudinal side elevation of the same showinthe lip or depression formed in one margina edge of the side of themold; Fig. 3 is a transverse section on the line IIIIII of Fig. 2 Fig. 4is a similar section on the line IVIV of Fig. 2; Fi 5 is an endelevation of the mold shown in i s. l and 4; Fig. 6 is a sectionalelevation s owing the molds as assembled together in formin the endlessstring of molds of a casting mac line.

Our invention relates to the construction of molds for casting apparatusemployed in casting a body of molten materials into a plurality ofrelatively small pieces and it more particularly relates to the moldsused on pig casting machines for forming molten cast iron into what isknown commercially as pig 11011.

The object of our invention is to provide a mold of improvedconstruction having means by which warping or distortion of the molds isovercome and the life of such molds is thereby increased while thecapacity of the molds is not reduced during the use of the apparatus.

Another object of the invention is to provide a mold having improvedmeans by which loss of molten metal during the casting 0 eration islessened and is overcome and by w ich the formation of scrap is reducedand loss or waste of the molten metal is prevented.

Heretofore the top marginal edge portion of such molds have had straightmarginal edges and in some cases flat marginal surfaces. The molten ironon striking these straight or fiat surfaces while the molds were passinbeneath a stream. of metal flowing from t e ladle into the molds wouldspatter and run in very much the same manner that drops of Water willrun when put on the top Specification of Letters Patent.

Application filed April 30, 1909.

Patented Aug. 24, 1909.

Serial No. 493,169.

amount of metal would fall from the molds and would be collected belowthe casting apparatus in the form of scrap. This entalls an expense inremoving periodically the scrap so formed, this removal bein necessaryin order to keep the apparatus 1n work ing condition.

11 the drawings, 2 represents one of the series of molds formin a pigcastin machine, the molds as shown icing formed y stamping or tracingfrom a plate of iron or steel into the sha e shown. The bottom portion 3of the mo (1 is curved transversely and is also curved lengthwise fromits center toward its ends as is clearly shown in F' s. 1 and 2. Themarginal top portions 0 the molds are inclined inwardly and downwardlyat all points and one longitudinal edge portion 4 of the mold isprovided with a depression 5 which also inclines inwardly and forms alip, this lip overlapping the opposite side on the adjacent mold whenthe molds are in assembled places as shown in Fig. 6. The end portions 6of the molds are provided with holes 7 through which bolts extend insecuring the molds in place on the links 8 forming the endless chains ofthe castin machine. The links 8 are provided witfi rods or shafts 9 onthe ends of which track wheels 10 are mounted. These wheels travel onthe track rails 11 of the apparatus in the usual manner.

In the use of casting ap aratus equipped with our improved molds tiiechain of molds travels away from the ladle from which a stream of molteniron or other material is poured. The stream of iron will strike the ipportion 5 and will be directed into the mold where it mingles with andforms part of the pig being formed. amount of metal which heretofore won(I roll from the 'mold and which would be lost is directed into the moldwhere it is collected and saved.

In the molds of such casting machines as heretofore constructed, thebottom portion was straight lengthwise-from the center toward its end.By reason of the action of the heat in the molten metal together withthe weight of the metal, the bottom of such molds would quickly becomearched, the bottom raising upwardly so as to very materially lessen thecapacity of the molds. This required the molds being changed frequentlyIn this way a lar e .ened and distortion and warping of the molds isthereby largely prevented. This results in very greatly increasing thelife of the molds while preventing the capacity of the molds from beingcut down and lessens the expense of maintaining the apparatus.

The advantages of our invention are many and will be appreciated bythose skilled in the art.

Modifications in the construction and arrangement of the molds may bemade without departing from our invention. The

overlap the o posite side of its adjacent mold, the over apping side ofthe mold having a central marginal depression forming a lip and slopingdownwardly and inwardly into the mold; substantially as described.

3. In a casting machine, a mold having inwardly sloping side portionsconverging into a curved bottom portion, the bottom portion curvinglongitudinally from the center toward the ends of the mold, the topmarginal edge on one side of the molds being arranged to overlap theopposite side of its adjacent mold, the overlapping side of the mold shaving a central marginal depression formin a lip and sloping downwardlyinto the mold; substantially as described.

4. In a casting machine a mold formed molds may be cast instead of beingformed l from a sheet of wrought metal having inof wrought metal asshown. The form and Wardly sloping sides converging into a shape of thelip on the overlapping edge of i curved bottom, the bottom curvinglongi- 1e degree of l tudlnally from the center toward the end of themolds may be changed.

curvature of the bottom portion may be I the mold, at least one uppermarginal edge modified and other changes may be made Within the scope ofthe claims.

We claim:

1. In a casting machine, a mold having inwardly sloping side portionsconverging into a curved bottom portion, the bottom portion curvinglongitudinally and trans- 5 versely from the center toward the ends andsides of the mold; substantially as described.

portion having a depression forming a lip thereln arranged to overlapthe ad olmng edge of the adjacent mold when the molds are assembled inlace von the casting machine; substantial y as described.

In testimony whereof, we have hereunto set our hands.

JACOB A. MOHR.

FREDERICK H. N. GERWIG.

2. In a casting machine, a mold having I inwardly sloping side portionsconverging: into a bottom ortion, curved longitudinally and transverse yone side being arranged to g

